/*
 * Copyright 2012 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package be.free.ts.support;

import com.google.common.base.Stopwatch;
import org.aopalliance.intercept.MethodInterceptor;
import org.aopalliance.intercept.MethodInvocation;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.Arrays;
import java.util.concurrent.TimeUnit;

/**
 * @author Christophe De Blende
 * @since 01/01/13
 */
class TracingInterceptor implements MethodInterceptor {

	private static final Logger LOGGER = LoggerFactory.getLogger(TracingInterceptor.class);

	@Override
	public Object invoke(MethodInvocation invocation) throws Throwable {
		Stopwatch sw = new Stopwatch().start();
		try {
			return invocation.proceed();
		} finally {
			if (LOGGER.isTraceEnabled()) {
				long elapsedNanoSeconds = sw.stop().elapsed(TimeUnit.NANOSECONDS);
				LOGGER.trace(String.format("Invocation of method %s() with parameters %s took %d ns.",
						invocation.getMethod().getName(), Arrays.toString(invocation.getArguments()), elapsedNanoSeconds));
			}
		}
	}
}
